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Old 11th October 2012, 11:30 AM   #151
AndrewT is offline AndrewT  Scotland
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But compensation is negative feedback !
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Old 11th October 2012, 01:29 PM   #152
dadod is online now dadod  Croatia
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Quote:
Originally Posted by homemodder View Post
Andrew the compensation is moved not the feedback.
Its an old trick, youd probably get the same result returning the compensation to the base of inverting input.

Good result though, interesting stuff Dado.
Yes homemodder I now about that old trick, but I couldn't get stable simulation with close enough distortion, so I gave up with it and never triad it in real circuit.
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Old 11th October 2012, 01:49 PM   #153
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Local negative feedback if you want to call it that not global.
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Old 11th October 2012, 01:53 PM   #154
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The issue is whether you get the same distortion figure with the same phase margin. In any amp compensation can be reduced for lower distortion but less stability results, thats not a good comparison.
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Old 11th October 2012, 02:00 PM   #155
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Quote:
Originally Posted by homemodder View Post
The issue is whether you get the same distortion figure with the same phase margin. In any amp compensation can be reduced for lower distortion but less stability results, thats not a good comparison.
Agree, I did it with similar phase and gain margin.
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Old 11th October 2012, 02:36 PM   #156
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I checked compared with post 1 and thats why I found good result, have you tried with the cascoded amp ??
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Old 11th October 2012, 02:47 PM   #157
dadod is online now dadod  Croatia
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Quote:
Originally Posted by homemodder View Post
I checked compared with post 1 and thats why I found good result, have you tried with the cascoded amp ??
Cascoded LTP or cascoded VAS?
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Old 11th October 2012, 02:58 PM   #158
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The hawksford cascoded vas.
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Old 11th October 2012, 03:51 PM   #159
dadod is online now dadod  Croatia
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Quote:
Originally Posted by homemodder View Post
The hawksford cascoded vas.
Yes I tried with my TT amp but not with so good result. It could be that distortion was already so low (simulated) that improvement is not obvious. TT amp, 200W/8ohm, 701W/2ohm
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Old 11th October 2012, 04:20 PM   #160
AndrewT is offline AndrewT  Scotland
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Hi Dadod,
I sent an Email this morning. No reply yet.
I wonder if it ended up in your Spam bin?
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